Thin layer samples controlled by dynamic electrochemistry

M Cuartero; G A Crespo; Eric Bakker

doi:10.2533/chimia.2015.203

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Thin layer samples controlled by dynamic electrochemistry

Journal article

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Thin layer samples controlled by dynamic electrochemistry

M Cuartero, G A Crespo and Eric Bakker

Chimia, Vol.69(4), pp.203-206

2015

DOI: https://doi.org/10.2533/chimia.2015.203

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Abstract

Chemical Sciences

coulometry

desalinator unit

ionophore-based membranes

paper-based microfluidic devices

thin layer sample

We summarize here recent advancements on thin layer samples controlled by dynamic electrochemistry techniques for determining different ions that include potassium, calcium, protamine, nitrate, nitrite and halides in diverse environmental and clinical samples. Generally, a thin layer liquid (less than 100 μm in thickness) is confined between a working electrode and an ion-selective membrane. Once an external electrical perturbation (i.e. constant potential) is applied to the system, an exhaustive ion transfer process is imposed in the entire thin layer solution. As a result, the observed charge (integration of the current decay) is proportional to the depleted ion concentration. Other electrochemical protocols such as linear sweep voltammetry were also explored aiming at the discrimination of several ions presented in the thin layer. One of the most attractive examples involves the detection of a mixture of three halides (iodide, bromide and chloride), which can be well resolved at moderated scan rates (10 mV.s-1 ). Paper-based coulometric sensing on thin layers defined by cellulose papers are being developed in view of translating these new concepts into a reliable and low cost sensing platform. © Schweizerische Chemische Gesellschaft.

Details

Title: Thin layer samples controlled by dynamic electrochemistry
Authors: M Cuartero (Author) - University of Geneva, Switzerland
G A Crespo (Author) - University of Geneva, Switzerland
Eric Bakker (Author) - University of Geneva, Switzerland
Publication details: Chimia, Vol.69(4), pp.203-206
Publisher: Schweizerische Chemische Gesellschaft
Date published: 2015
DOI: 10.2533/chimia.2015.203
ISSN: 0009-4293
Organisation Unit: University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99449407302621
Output Type: Journal article

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Web Of Science research areas: Chemistry, Multidisciplinary